How about a map with one planet only? The game randomly picks which civ gets the planet, and if it's your civ, you win! This would certainly solve a lot of issues, such as unfair tech trading, civ trait imbalances, fleet management issues, tech tree problems, bad grammar, and the like. Plus, I don't like long, drawn-out games where you know you're going to win, but you spend forever mopping up a galaxy with 5,000 worlds.